Ensure all packages have a specified class initialization strategy

Author: Christian Wimmer

mx.graalpython/native-image.properties

@@ -11,6 +11,7 @@ Args = -H:MaxRuntimeCompileMethods=20000 \
        -H:+AddAllCharsets \
        -H:IncludeLocales=no,be,ro,ru,es,se,in,ka,hu,hr,bg,is,mk,da,nn,cs,sq,fr,pl,fo,bs,kl,fa,sv,it,uk,af,tg,ps,de \
        --initialize-at-build-time=com.oracle.graal.python,com.oracle.truffle.regex,jline,org.fusesource \
+       --initialize-at-run-time=org.tukaani.xz \
        -H:ReflectionConfigurationResources=com/oracle/graal/python/resources/reflect-config.json \
        -H:ResourceConfigurationResources=com/oracle/graal/python/resources/resource-config.json \
        -H:JNIConfigurationResources=com/oracle/graal/python/resources/jni-config.json \